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GEORGE SHALE, OF TAUNTON, MASSACHUSETTS. Lean Patent m. 72,092, dated December '10, 1867.

mrnovnnnnr In STEAM-ENGINES;

Be it known that I, Gnonon Susan, of Taunton, in the county of Bristol, and State of Massachusetts, have invented anew and useful Improvement in Oscillating Steam-Engines and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of the specification, in which-- Fig'ure 1 represents a vertical longitudinal section of the steam-engine.

Figure 2 represents an end view of the some. 7

Figure 3 represents a transverse section of the steam-chest and reversing-gear.

The'same letters refer to the same parts in the separate figures.

v The object of my invention is to produce a simple, cheap, and efiectivc steam-engine, to economize the power expended in moving the steam-valve, and to construct a reversing-gear whichcan be easily managed by hand, even in the most powerful engines; and-my invention consists in so constructing the steam-chest as to :dispensc entirely with the steam-valves, (either slide or poppet-valves,) by dividing it bya partition into two chambers, each communicating by two apertures with the ports of the cylinder, and are also connected with the induction and reduction-pipes respectively; it further consists in constructing and arranging the reversinggear, by passing the valve-stems or rods of thereverse-lever transversely through the steam and exhaust-pipes, in such a manner that when one of the valve-rods opens a communication betweeli the steam-pipe and one of the'chambers of the steam c'hest, the other valve-rod will open communication between the exhaust-pipe and the other chamber, and by shifting the reverse-lever, the position of the two valve-rods will be reversed; and

my invention consists further in hanging the cylinder to the frame in such a manner that the c'entral line of the cylinder will swing in a plane which is parallel to the ports and the steam-chest. f Referring to the drawings, A represents the supporting-frame, containing the-steammhest B in its lower portion. Through the centre of the lower portion of the frame passes a pin or bar, c,p rovided-with a screw on its outer end, which screw fits in a corresponding hub or socket on the cylinder a, as shown, upon which the cylinder oscillates. The cylinder may, when required, besupportcd'in bearings onboth sides. dd are the two parts of the cylinder which extend through the two flanges or segments m m, attached to or forming part i of the cylinder and sliding against the steam-chest. The steam-chest B is divided by a partition, 1), into two chambers, g h, thepartition'being connected with the induction-pipe sand the exhaust-pipe t. 'Each chamber is also connected with the said pipes, and communicates with the cylinder by two apertures. The chamber g thus communicates by'mcans of the apertures e e with the ports d d, and the chamber In by the openings f f" with the ports d d. The walve-rodst z" are formed with chambers or recesses 7c 70', as shown in fig. 3, and pass transversely through the ends of the pipes s and t respectively, within the steam-chest; the chambers or recesses being so arranged that while the communication is open fronr the pipes s to the chamber gof the ,steam-c-liest, it is closed from the chamber h, and vice versa. The valve-rods i z" are attached each at their outer ends to a lever, l, by which they are' reversed.

The operation of the engine is as follows: By setting the lever Z, as shown in fig. 3, steam is admitted through the steam-pipes e, and passes through .the recess 7: of the valve-rod i,'into the chamber 9 of the steamchest, and from there through th passages e e-,'fig. 2, into the cylinder a, as the ports'd d of the cylinder pass across the passages c c. When the ports old of the cylinder pass overth'e openingsff', the steam in the cylinder is exhausted into the chamber h, and passes through the recess it into the exhaust-pipe t. By reversing the lever l, the motion of the valve-rod z' efl'ects, by means ofrecess k, communication with chamber It, thus allowing the steam to enter from the pipe 8, when the valve-rod z", by means of recess It, allows the exhaust steam in chamber gto enter the exhaust-pipe t. t

What I claim as ,myinvention, and desire to secure by Letters Patent, is-

1. The steam-chestB, constructed with the' ehambersg h, and partition 12, in combination with the steam and exhaust-pipes, and cylinder at, substantially as described.

2. The valve-rods ii, provided with the recesses or; chambers It is, in combination with partition 1), constructed as described, and operated by the lever Z, as and for thepurpose set forth.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

GEORGE SHALE.

Witnesses:

J. H. ADAMS, M.' S;. G. Wmm. 

